package demo;
import java.lang.Object;
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader; 
public class code {
	private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";  
	public String getSerial(String userId, String licenseNum) {  
  		java.util.Calendar cal = java.util.Calendar.getInstance();  
  		cal.add(1, 3);  
  		cal.add(6, -1);  
  		java.text.NumberFormat nf = new java.text.DecimalFormat("000");  
  		licenseNum = nf.format(Integer.valueOf(licenseNum));  
  		String verTime = new StringBuilder("-").append(  
    		new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))  
    		.append("0").toString();  
  		String type = "YE3MP-";  
  		String need = new StringBuilder(userId.substring(0, 1)).append(type)  
			.append("300").append(licenseNum).append(verTime).toString();  
  		String dx = new StringBuilder(need).append(LL).append(userId)   .toString();  
  		int suf = this.decode(dx);  
  		String code = new StringBuilder(need).append(String.valueOf(suf))   .toString();  
 		 return this.change(code);  
}  

	private int decode(String s) {  
  int i;  
  char[] ac;  
  int j;  
  int k;  
  i = 0;  
  ac = s.toCharArray();  
  j = 0;  
  k = ac.length;  
  while (j < k) {  
   i = (31 * i) + ac[j];  
   j++;  
  }  
  return Math.abs(i);  
}  
    private String change(String s) {  
  byte[] abyte0;  char[] ac; int i;  int k;  int j;  
  abyte0 = s.getBytes();  
  ac = new char[s.length()];  
  i = 0;  
  k = abyte0.length;  
  while (i < k) {  
   j = abyte0[i];  
   if ((j >= 48) && (j <= 57)) {  
    j = (((j - 48) + 5) % 10) + 48;  
   } else if ((j >= 65) && (j <= 90)) {  
    j = (((j - 65) + 13) % 26) + 65;  
   } else if ((j >= 97) && (j <= 122)) {  
    j = (((j - 97) + 13) % 26) + 97;  
   }  
   ac[i] = (char) j;  
   i++;  
  }  
  return String.valueOf(ac);  
}  
	public code() {  
  super();  
}  
	public static void main(String[] args) {  
  		try {  
   System.out.println("please input register name:");  
   BufferedReader reader = new BufferedReader(new InputStreamReader(  
     System.in));  
   String userId = null;  
   userId = reader.readLine();  
  code myeclipsegen = new code();  
   String res = myeclipsegen.getSerial(userId, "5");  
   System.out.println("Serial:" + res);  
   reader.readLine();  
  } catch (IOException ex) {  
  }  
}  
}